Arduino Stack Exchange
Arduino Stack Exchange

Questions tagged [home-automation]

For questions about using an Arduino to automate a home environment. For general home automation questions that aren't about Arduino, ask at Internet of Things Stack Exchange instead.

54 questions
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7 answers

How to remember variable values after rebooting an Arduino Uno R3 board?

Is there any way to store the values of necessary variables somewhere (may be in a file that gets updated by the program at various events), which can be read back when program starts after rebooting the Arduino board? I am trying to control my AC…
Samik Chattopadhyay
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3
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3 answers

How to perform multitask using arduino such as update data as well as check condition?

Here data is updated after every 2 seconds. But when the condition is true then the valve and motor process starts and data is updated only after completion of that part (i.e., data is updated after 25 seconds). I want data updation and condition…
Jashanjot Kaur
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3
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3 answers

Endurance of Arduino UNO during 24/7 operations and mild power fluctuations

I am designing an automation system for my research project and planning on using Arduino Uno to do the same. The program is to execute simple instructions based on few input parameters and does not need large computational powers. It is estimated…
Electro_Boomer
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3
votes
2 answers

How to use Multipile millis()

I've a exhaust fan that runs when the humidity is high. When the exhaust fan is on it should work for 3 minutes and should wait another 5 minutes to on. I am a beginner to this struggling for almost 2 days now. with this code the led just blink and…
user2037091
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3
votes
5 answers

Fan regulator control from Arduino

I'm trying to control my ~230 V fan from the Arduino. Can anyone say the best possible ways to design a fan regulator that can be controlled by the Arduino using a low cost design.
Sivamani V
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3
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2 answers

MQTT over serial

I'm planning to build a 32 relay IOT node next to my Raspberry Pi. The relays will be controlled by an Arduino Mega 2560. The Pi will run Home Assistant and Mosquitto so I would prefer to communicate with the arduino using MQTT. The Arduino and the…
pvoj
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3
votes
1 answer

Arduino and big servo

My dad told me, if i can mount some servo (to control 4 way ventil of heating) to his arduino-controlled home. But there is a problem... The servo does not have a normal 3 cables but 6 and I have no idea how to control. So i start some research…
Milan
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3
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4 answers

home automation - What's a compact way to control a light switch with Arduino without interacting with high voltage?

To be clear, this question is not about physically wiring into the light switch to control the lights - simply pressing on the switch from the outside. I apologize in advance if my electrical vocabulary isn't up to par - I'm very new to this. I have…
Ethan Ollins
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3
votes
1 answer

Controlling amplifier using remote control jack

Many older amplifiers support wired remote control through connector jacks or ports. My 10-year old Marantz also supports this function, using a simple RCA connector. Originally these were used with external IR receivers when the unit was not kept…
retrography
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3
votes
3 answers

Link to an project for remotely turning off light switch?

I want to build a contraption using an arduino that allows me to turn off my light from across the room. I plan to use a solenoid to move the lights switch up and down. I'm sure I'll have some specific questions later on but to start with, has…
James M.
3
votes
3 answers

Communication between two Bluetooth modules of two Arduinos

I am designing a home automation project. I want to control different home appliances through GSM. I am designing it in such a way that each apparatus is connected to an Arduino and bluetooth module. There is a master unit with Arduino, Bluetooth…
sreedevi s
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3
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1 answer

Accuracy of liquid level measurement using sonar sensor

Is it a good way to measure liquid level in a water tank using a general purpose sonar sensor? How can echoes from the tank walls affect measurement accuracy? I have a cylinder shaped horizontal 700L water tank, used for emergency water supply. I…
stardust
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3
votes
1 answer

A/C doesn't detect IR codes sent from Arduino

I have an IR receiver and an IR LED I got from a kit (I don't have the datasheets for them). I uploaded an Arduino sketch to record my A/Cs IR codes. Those were NEC encoded 32bit integers. After recording the codes, I tried retransmitting them. The…
omribahumi
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2
votes
1 answer

What are the best GPIO pins to use for my project?

I'm working on a home automation project to control my Sommer Base+ garage door opener through Home Assistant. The project consists of a WeMos D1 Mini with two reed switches (to detect door open/closed) and a 5V relay to control the door…
jampez77
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2
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1 answer

using multiple hc-05 with one arduino mega

please anyone help me build my project, i want to connect multiple smart phones to arduino mega using blutooth module hc-05 , I am working on real life home automation project and i don't have idea that can i use 4 Bluetooth modules with arduino…
Aditya Khot
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